Abstract
To study the magnetic interaction between Mn3+ and Ru4+, we designed and synthesized a series of samples La1−x Sr x Mn1−x Ru x O3 (0 ≤x ≤ 0.80), in which Mn and Ru ions remain as Mn3+ and Ru4+, respectively. The structural, magnetic, and transport properties of polycrystalline La1−x Sr x Mn1−x Ru x O3 (0 ≤x ≤ 0.80) were investigated. Measurements of magnetization show that Ru4+ substitution induces and enhances ferromagnetism as x≤ 0.30. According to measurements of electronic conductivity, all doping samples show the insulating behaviors without metal-insulation transition. However, with increasing Ru4+ substitution, resistivity decreases and a shoulder appears in the ρ(T) curves at around corresponding Curie temperature for 0.10 ≤ x ≤ 0.40. A large magnetoresistance effect is also observed in La0.60Sr0.40Mn0.60Ru0.40O3. All these phenomena is confirmed to be related with the double exchange interaction between Mn3+ and Ru4+ ions.
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Acknowledgments
This work was supported by National Nature Science Foundation of China through Grant No. 11204270 and Zhejiang Provincial Natural Science Foundation of China through Grant No. LQ12A04003.
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Ying, Y., Zheng, J., Qiao, L. et al. Double Exchange Interaction Between Mn3+ and Ru4+ Ions in La1−x Sr x Mn1−x Ru x O3 . J Supercond Nov Magn 28, 3117–3120 (2015). https://doi.org/10.1007/s10948-015-3146-y
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DOI: https://doi.org/10.1007/s10948-015-3146-y